Question
A Student was asked to add 8 and subtract 5 from a
number. By mistake, he added 5 and subtracted 8. If his answer is 11, what should be the correct answer?Solution
Let the number be x And the correct answer be y According to the question x + 8 – 5 = y x + 3 = y ...................(i) Again, x + 5 – 8 = 11 x = 14 Put the value of x in (i) We get, 14 + 3 = y y = 17
More No. System Questions
(24% of 500 - 20) ÷ 25 = ? ÷ 4
52% of 36% of 810 = 72% of 18% of ?
13 X √? + 256 ÷ 4 = 30% of 900 - 50
If √3n 729, then the value of n is equal to:
18/2 of 3/9 of 2/6 of 69690 = ?
136% of 560 - 2/7 of 630 + 45% of 420 =?
7(1/7)% of 3500 + 6(2/3) % of 6000 = ? + 552.5
30, 39, 66, ? , 174, 255
- Evaluate: 210 ÷ 15 × 7 + 200 – 50% of 600
Relevant for Exams:
