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Here are 100 of the most common math questions across different levels (elementary to early high school), with their answers:

🔢 Basic Arithmetic

1. What is 2 + 2?
   👉 4
2. What is 10 – 4?
   👉 6
3. What is 5 × 6?
   👉 30
4. What is 20 ÷ 4?
   👉 5
5. What is 12 + 15?
   👉 27
6. What is 100 – 75?
   👉 25
7. What is 9 × 9?
   👉 81
8. What is 81 ÷ 9?
   👉 9
9. What is 25 + 36?
   👉 61
10. What is 40 ÷ 5?
    👉 8

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🧮 Fractions & Decimals

11. What is 1/2 + 1/4?
    👉 3/4
12. What is 3/4 – 1/4?
    👉 1/2
13. What is 2/3 × 3/5?
    👉 2/5
14. What is 1/2 ÷ 1/4?
    👉 2
15. Convert 0.75 to a fraction.
    👉 3/4
16. What is 0.1 + 0.2?
    👉 0.3
17. What is 1.5 × 2?
    👉 3
18. What is 3.6 ÷ 0.6?
    👉 6
19. Convert 1/5 to decimal.
    👉 0.2
20. What is 0.25 + 0.75?
    👉 1

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📏 Geometry

21. How many degrees are in a triangle?
    👉 180°
22. How many sides does a hexagon have?
    👉 6
23. What is the perimeter of a square with side 5cm?
    👉 20 cm
24. What is the area of a rectangle with length 6 and width 4?
    👉 24
25. What is the area of a circle with radius 3? (π = 3.14)
    👉 28.26
26. What is the volume of a cube with side 4?
    👉 64
27. What is the perimeter of a triangle with sides 3, 4, and 5?
    👉 12
28. What is the area of a triangle with base 8 and height 5?
    👉 20
29. What is the circumference of a circle with radius 7? (π = 3.14)
    👉 43.96
30. What is the volume of a cylinder with radius 3 and height 5? (π = 3.14)
    👉 141.3

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📊 Algebra & Equations

31. Solve: x + 5 = 12
    👉 x = 7
32. Solve: 3x = 15
    👉 x = 5
33. Solve: 2x + 3 = 11
    👉 x = 4
34. Factor: x² – 9
    👉 (x – 3)(x + 3)
35. Solve: x² = 25
    👉 x = ±5
36. If y = 2x + 1, find y when x = 3
    👉 y = 7
37. Simplify: 3x + 4x
    👉 7x
38. Simplify: 2(x + 3)
    👉 2x + 6
39. What is the value of x in: x/2 = 6?
    👉 x = 12
40. What is the square root of 81?
    👉 9

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🧠 Word & Logic Problems

41. If you have 3 apples and buy 5 more, how many apples?
    👉 8
42. A car travels at 60 km/h for 2 hours. Distance?
    👉 120 km
43. You have $10. Buy 2 items for $3 each. What’s left?
    👉 $4
44. If 5 pencils cost $10, what is the cost of 1 pencil?
    👉 $2
45. If a pizza is cut into 8 slices and you eat 3, how many left?
    👉 5
46. A rectangle’s length is 10 and width is 5. What’s the area?
    👉 50
47. A number increased by 5 is 12. What is the number?
    👉 7
48. If a clock shows 3:00, how many degrees between the hour and minute hands?
    👉 90°
49. What is the average of 4, 8, and 10?
    👉 7.33
50. A box contains 6 red, 4 blue, and 10 green balls. What’s the probability of picking a red ball?
    👉 6/20 or 0.3 or 30%

⚖️ Ratios, Proportions & Percentages

51. What is 25% of 200?
    👉 50
52. What is 15% of 80?
    👉 12
53. Increase 120 by 10%.
    👉 132
54. Decrease 90 by 20%.
    👉 72
55. What is the ratio of 2 to 8?
    👉 1:4
56. If 3 pens cost $9, how much do 5 pens cost?
    👉 $15
57. What percent is 30 out of 60?
    👉 50%
58. If 4:5 = x:20, what is x?
    👉 16
59. If a shirt costs $40 and there’s a 25% discount, what is the sale price?
    👉 $30
60. What is 120% of 50?
    👉 60

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⏱️ Time, Speed & Distance

61. If a train moves at 90 km/h for 3 hours, what distance does it cover?
    👉 270 km
62. If it takes 4 hours to cover 200 km, what is the speed?
    👉 50 km/h
63. If a car travels 150 km at 75 km/h, how long does it take?
    👉 2 hours
64. A person walks 3 km in 30 minutes. What is their speed in km/h?
    👉 6 km/h
65. How many minutes are in 2.5 hours?
    👉 150 minutes
66. How many seconds in 1.25 minutes?
    👉 75 seconds
67. If a man walks 2 km in 20 minutes, how far in 1 hour?
    👉 6 km
68. If you start work at 8:45 AM and finish at 4:30 PM, how long did you work?
    👉 7 hours 45 minutes
69. If a plane travels 600 km in 2 hours, what’s the average speed?
    👉 300 km/h
70. If it’s 2:30 PM now, what time will it be in 5 hours 15 minutes?
    👉 7:45 PM

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🧠 Powers, Roots, & Indices

71. What is 2⁴?
    👉 16
72. What is 5²?
    👉 25
73. What is √144?
    👉 12
74. What is 3³?
    👉 27
75. What is 10⁰?
    👉 1
76. What is (2³)²?
    👉 64
77. What is √49?
    👉 7
78. What is the cube root of 125?
    👉 5
79. What is 4⁻¹?
    👉 1/4
80. What is 2 × 10⁴?
    👉 20,000

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📊 Statistics & Probability

81. What is the mean of 5, 10, 15?
    👉 10
82. What is the median of 3, 7, 9, 10, 15?
    👉 9
83. What is the mode of 2, 4, 4, 6, 7?
    👉 4
84. What is the range of 10, 20, 30, 50?
    👉 40
85. If a die is rolled, what’s the probability of getting a 6?
    👉 1/6
86. If a coin is tossed, what’s the probability of heads?
    👉 1/2
87. If 2 coins are tossed, what’s the probability of both heads?
    👉 1/4
88. What is the probability of drawing an ace from a standard deck of 52 cards?
    👉 4/52 or 1/13
89. If the mean of 5 numbers is 8, what is their total sum?
    👉 40
90. If 60% students passed and there are 80 students, how many passed?
    👉 48

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🧩 Miscellaneous Word Problems

91. A shop sells 3 notebooks for $18. What’s the cost of 1?
    👉 $6
92. You scored 18, 20, and 22 in 3 tests. What’s your average?
    👉 20
93. If 1 kg of rice costs $45, how much for 2.5 kg?
    👉 $112.50
94. A number is doubled and then 6 is added. Result is 20. What’s the number?
    👉 7
95. A recipe needs 3/4 cup of sugar. You have 2 cups. How many times can you make it?
    👉 2 full times
96. You buy an item for $80 and sell it for $100. What is the profit percent?
    👉 25%
97. If the perimeter of a square is 40 cm, what is the side length?
    👉 10 cm
98. A triangle has angles 50° and 60°. What’s the third angle?
    👉 70°
99. If 4 machines can produce 100 units in 5 hours, how many units in 10 hours?
    👉 200
100. If 1 liter = 1000 ml, how many ml in 2.5 liters?
     👉 2500 ml