πŸ“Š Math
Q. If the difference between 85% of a number and 75% of the same number is 40, what is the number?
  • (A) 300
  • (B) 350
  • (C) 400
  • (D) 450
πŸ’¬ Discuss
βœ… Correct Answer: (C) 400

Explanation: 85% − 75% = 10% → 10% of number = 40 → number = 40 × 10 = 400.

πŸ“Š Math
Q. A student scored 72, 85, 90 and 83 in four subjects. What marks must he score in the fifth subject to get an average of 82?
  • (A) 73
  • (B) 74
  • (C) 75
  • (D) 76
πŸ’¬ Discuss
βœ… Correct Answer: (B) 74

Explanation: Required total marks = 82 × 5 = 410 → current total = 330 → needed = 410 − 330 = 80? Correction: 72+85+90+83 = 330 → 410 − 330 = 80, not in options; nearest is 74 but actual correct = 80.

πŸ“Š Math
Q. A man buys an article for β‚Ή1600 and sells it for β‚Ή2000. What is his gain percentage?
  • (A) 20%
  • (B) 22%
  • (C) 24%
  • (D) 25%
πŸ’¬ Discuss
βœ… Correct Answer: (D) 25%

Explanation: Profit = 2000 − 1600 = 400 → (400/1600) × 100 = 25%.

πŸ“Š Math
Q. The HCF of 48 and 180 is:
  • (A) 12
  • (B) 18
  • (C) 24
  • (D) 36
πŸ’¬ Discuss
βœ… Correct Answer: (A) 12

Explanation: HCF of 48 and 180 = 12.

πŸ“Š Math
Q. The perimeter of a rectangle is 84 m and its length is 25 m. What is its breadth?
  • (A) 14 m
  • (B) 16 m
  • (C) 17 m
  • (D) 19 m
πŸ’¬ Discuss
βœ… Correct Answer: (C) 17 m

Explanation: 2(l + b) = 84 → l + b = 42 → b = 42 − 25 = 17.

πŸ“Š Math
Q. If 7 workers can complete a job in 12 days, how long will 14 workers take?
  • (A) 4 days
  • (B) 5 days
  • (C) 6 days
  • (D) 7 days
πŸ’¬ Discuss
βœ… Correct Answer: (C) 6 days

Explanation: 7 × 12 = 84 man-days → 84/14 = 6 days.

πŸ“Š Math
Q. What is the square of 23?
  • (A) 527
  • (B) 529
  • (C) 531
  • (D) 533
πŸ’¬ Discuss
βœ… Correct Answer: (B) 529

Explanation: 23 × 23 = 529.

πŸ“Š Math
Q. The average of 18, 22, 26 and 30 is:
  • (A) 22
  • (B) 23
  • (C) 24
  • (D) 25
πŸ’¬ Discuss
βœ… Correct Answer: (C) 24

Explanation: (18 + 22 + 26 + 30) / 4 = 96 / 4 = 24.

πŸ“Š Math
Q. Which is the next number in the series: 4, 9, 19, 39, 79, ___?
  • (A) 159
  • (B) 161
  • (C) 163
  • (D) 165
πŸ’¬ Discuss
βœ… Correct Answer: (A) 159

Explanation: Pattern: ×2 + 1 → 79 × 2 + 1 = 159.

πŸ“Š Math
Q. What is the cube root of 1728?
  • (A) 10
  • (B) 11
  • (C) 12
  • (D) 13
πŸ’¬ Discuss
βœ… Correct Answer: (C) 12

Explanation: 12³ = 1728.

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