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Basic mathematics

Written by Hassan Raza (Mathematics)

FAST · Mathematics · 20 questions

Name: ____________________ Date: ____________

What is 25% of 480?
- A 160
- B 100
- C 120
- D 140
Two numbers are in the ratio 3 : 5 and their sum is 64. The larger number is:
- A 32
- B 24
- C 36
- D 40
A train travels at 60 km per hour for 2.5 hours. The distance covered is:
- A 180 km
- B 135 km
- C 120 km
- D 150 km
The simple interest on Rs 5000 at 8% a year for 3 years is:
- A Rs 1500
- B Rs 1000
- C Rs 1200
- D Rs 400
The LCM of 12 and 18 is:
- A 216
- B 72
- C 36
- D 6
The average of five numbers is 20. A sixth number, 32, is added. The new average is:
- A 26
- B 24
- C 21
- D 22
A shirt priced at Rs 1500 is sold at a 20% discount. The selling price is:
- A Rs 1000
- B Rs 1280
- C Rs 1200
- D Rs 1300
The value of 3/4 + 5/6 is:
- A 15/24
- B 19/12
- C 4/3
- D 8/10
If 2x + 7 = 25, then x is:
- A 9
- B 11
- C 16
- D 7
Eight workers finish a job in 12 days. How many days will 6 workers need?
- A 18
- B 14
- C 16
- D 9
The square root of 1764 is:
- A 38
- B 44
- C 46
- D 42
An item bought for Rs 800 is sold for Rs 1000. The profit percentage is:
- A 30%
- B 20%
- C 25%
- D 200%
40% of 250 is:
- A 100
- B 90
- C 125
- D 110
The average of 12, 15 and 18 is:
- A 15
- B 16
- C 45
- D 14
Rs 600 is shared in the ratio 2 : 3. The larger share is:
- A Rs 300
- B Rs 360
- C Rs 240
- D Rs 400
A can do a job in 10 days and B in 15 days. Working together they finish it in:
- A 5 days
- B 25 days
- C 12.5 days
- D 6 days
A speed of 72 km/h is equal to:
- A 15 m/s
- B 25 m/s
- C 20 m/s
- D 72 m/s
The area of a triangle with base 10 cm and height 6 cm is:
- A 36 cm²
- B 60 cm²
- C 30 cm²
- D 16 cm²
The decimal 0.75 as a fraction is:
- A 1/75
- B 3/5
- C 3/4
- D 7/5
If x ÷ 4 = 9 ÷ 12, then x is:
- A 2
- B 36
- C 3
- D 4

Answer key

1. C, 2. D, 3. D, 4. C, 5. C, 6. D, 7. C, 8. B, 9. A, 10. C, 11. D, 12. C, 13. A, 14. A, 15. B, 16. D, 17. C, 18. C, 19. C, 20. C

25% is one quarter, and 480 divided by 4 is 120.
The sum of the parts is 8, so one part is 8 and the larger number is 5 × 8 = 40.
Distance = speed × time = 60 × 2.5 = 150 km.
Interest = 5000 × 8 × 3 ÷ 100 = 1200.
12 = 2² × 3 and 18 = 2 × 3², so the LCM is 2² × 3² = 36.
The sum is 100 + 32 = 132, and 132 ÷ 6 = 22.
The discount is 300, so the price is 1500 − 300 = 1200.
The common denominator is 12: 9/12 + 10/12 = 19/12.
2x = 18, so x = 9.
The work is 8 × 12 = 96 worker days, and 96 ÷ 6 = 16 days.
42 × 42 = 1764.
Profit is 200 on a cost of 800, which is 25%.
40 ÷ 100 × 250 = 100.
The sum is 45 and 45 ÷ 3 = 15.
One part is 120, so the larger share is 3 × 120 = 360.
Their daily work is 1/10 + 1/15 = 1/6.
72 × 1000 ÷ 3600 = 20 m/s.
Area = ½ × 10 × 6 = 30.
0.75 = 75/100 = 3/4.
The ratio 9/12 is 3/4, so x = 3.