Question
The average age of 20 girls is 54 years. If the age of
two more girls is added the average decreases by half a year. What is the sum of the age of new girls?Solution
Total age of 20 girls = 20 × 54 = 1080 years  If the age of two more girls is added the average decreases by half a year,  ∴ Total age of 22 girls = 53.5 × 22 = 1177  Now, sum of the age of new girls = 1177 – 1080 = 97 years
144 (1/2) × 14 – 28 = 7 × ?Â
What will come in the place of question mark (?) in the given expression?
28 × 15 + 48% of ? = 780
What will come in the place of question mark (?) in the given expression?
7 X 18 + ? = (52 - 6) X 9
Simplify: (23×32) ÷6
What should come in place of the question mark (?) in the following question?
2 – [6 – {3 + (–4 + 5 + 1) × 8} + 12] = ?
? ÷ [35% of 379 - 34(4/5)] = 0.4
(1748 ÷ 8) + 76.8 × 35 =(? × 4) + (42 × 35.5)
- 40% of 225 – 25% of 120 = 15% of ?
- What will come in place of (?) in the given expression.
√324 + √121 – √49 = ? Simplify the following expression and find the final value:
(18 ÷ 6 of 2 + 7 of 5) ÷ 5
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