Question
Laxman and his grandmother's current average age is 38
years. Four years from now, Laxman's age will be one-third of his grandmother's current age. Determine the grandmother's current age.Solution
Sum of present ages of Laxman and his grandmother = 38 X 2 = 76 years Let the present age of Laxman = 'x' years Then, present age of Laxman's grandmother = (76 - x) years According to the question, (x + 4) X 3 = (76 - x) Or, 3x + 12 = 76 - x Or, 4x = 64 So, x = (64/4) = 16 And so, present age of Laxman's grandmother = 76 - 16 = 60 years Hence, option a.
Evaluate: 360 ÷ [ {18 − (6×2)} × 5 ] + 72 − 33
(43)² - (28)² + (32)² = ?% of 2500
Evaluate:
√729 + √49 - √16 + 1/√64
What will come in place of (?) in the given expression.
12.5 + 7.75 - 3.6 = ?62 of 8 - 320 ÷ 4 = ?3 + 200
2(1/3) + 2(5/6) – 1(1/2) = ? – 6(1/6)
What will come in the place of question mark (?) in the given expression?
30% of 520 + 16% of 1500 = ? + 244
60% of 120 – ?% of 64 = 20% of 200
35% of 840 + 162 = ? – 25% × 300
20% of 240 + 18% of 200 = ?
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