Question
The average of five even numbers is 62. If we replace
two of these even numbers, 84 and 92, with a single even number X, the new average decreases by 4. What is the value of X?Solution
Sum of 5 even numbers = 5 x 62 = 310 Sum of after 2 replacing even numbers by X = 310 - (84 + 92) + X = 310 - 176 + X Now Sum of 4 even numbers = (62 - 4) x 4 = 232 According the question, we get 310 – 176 + X = 232 X = 232 – 310 + 176 X = 98
- Find the value of the expression:
15 + 10 – 6 × [20 + 8 – 2 × (50 – 35)] (? + 180 + 13 × 6) ÷ 20 + 3.5 × 512 (1/3) = 82
√10000 × √8100 - (50)² = √(?) + (80)²
5/2 of 5/6 of 12/5 of 54 % of 5250 = ?
What will come in the place of question mark (?) in the given expression?
(? ÷ 16) = (20 ÷ ?) X 20322 – 182 + 11 × 24 = ?
What will come in the place of question mark (?) in the given expression?
59.92 × 15.11 + √4224 = ? + 144.9Â
What will come in the place of question mark (?) in the given expression?
(87 + 79) X √9 - 298 = ? + √3600
5121.3 × 641.8 ÷ 80.5 = 8?
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