Question
50 children can decorate a hall in 25 days. If 25
children began decorating and after 10 days ‘z’ additional children joined, completing the decoration in 20 more days, find ‘z’.Solution
Total work = 50 × 25 = 1250 units Work completed by 25 children in 10 days = 25 × 10 = 250 units Remaining work to be completed by (25 + z) children = 1250 – 250 = 1000 units Therefore, (25 + z) × 20 = 1000 Or, 25 + z = 1000 / 20 Or, 25 + z = 50 Or, z = 50 – 25 = 25 Number of children added = 25
What will come in the place of question mark (?) in the given expression?
(11/45) of 225 + 3 X 75 = ? X (72 ÷ 6 + 4)
182 – 517 ÷ 11 - √361 = ?
√11025 x √5625 - (50)² = (?) + (73)²
What is 12% of 4% of 7% of 2 x 106 ?
37% of 810 – 32% of 460.5 = ?
19 × ? =361 ÷ 19
What will come in place of the question mark (?) in the following expression?
46 – 5² + 8² + 3² = ? × 4
[(120)2 ÷24 ×25] ÷ 250 =?
Simplify the following expressions and choose the correct option.
864 ÷ 16 + 2⁵ × 3 = ?
{(522 – 482 ) ÷ (27 + 73)} × 35 = ?% of 175
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