Question
In a two digit positive number, the digit in the
unit’s place is equal to the square of the digit in ten’s place, and the difference between the number and the number obtained by interchanging the digits is 54. What is 60% of the original number?Solution
Let the number = 10x + x 2 According to the question, 10x + x2 - (10x2 - x) = 54 9(x2 - x) = 54 x 2 - x = 6 x2 - x – 6 = 0 ( x - 3) (x + 2) = 0 x = 3 or x = -2 Number = 39 [x ≠ -2] 60% of 39 = (60/100) × 39 = 23.4
More Percentage Questions
(20% of 15% of 600 – 6) × 5 + 84 = ?2Â
180 ÷ 3 of 2 = 102 – ?
The sum of two numbers is 16 and their product is 63. The sum of their reciprocal is equal to:
∛21952 × 44 = ? × 14
What will come in the place of question mark (?) in the given expression?
(√1089 + 84 ÷ 2) % of 348 = 416 - ?
What will come in the place of question mark (?) in the given expression?
{(16 × 25) ÷ 32} × 12 = ? – 200
- What will come in place of (?) in the given expression.
(18 × 2) + (72 ÷ 3) – 16 = ? 13 X √? + 256 ÷ 4 = 30% of 900 - 50
1365 ÷ 15 + (? ÷ 5) = 62 × 3.5
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