Question
If 78% of (A - B) is equal to 26% of 90% of (A + B), then
find the ratio of B to A.Solution
ATQ,
Given
78% of (A - B) = 26% of 90% of (A + B)
Or, 39 × (A - B) = 117 × (A + B) [78% = 39/50, and 26% of 90% = 23.4% = 117/500]
Multiply both sides by 500 to eliminate denominators:
→ 19500 × (A - B) = 117 × (A + B) × 50
→ 19500A - 19500B = 5850A + 5850B
→ 13650A = 25350B
→ A/B = 25350 / 13650 = 13 / 7
So, B/A = 7/13
69, 35.5, 39.5, 68.25, 152.5, ?
3   2    10   ?   17   16
Find the missing number in the given number series.
4, ?, 110, 665, 4660, 37285
195% of 1420 + 72 × 25 =?
55   56    52   61    ?      70    34
...[(145)² ÷ 25 × 52] ÷ ? = 29 × 13
53 × 38 + 32 × âˆ›54872 = ?
What will come in place of the question mark (?) in the following series?
24, 25, 34, 59, 108, 189, ?
(102 × 24)/8 = ?
What will come in place of (?) question mark in the given number series.
10, 17, 26, 37, 50, ?
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