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Let the present age of A and his son be 5x and 2x respectively. => (5x – 5) – (2x – 5) = 21 => x = 7 Required sum = [(5 + 2) × 7] + 11 = 60 years
Calculate the simplified result of the following expression: 12 × 18 ÷ 3 + 36 of 32 ÷ 3
? (1/2) = 236 – 25 × 18/2 + 396 ÷ 22
Determine the simplified value of the expression: 12 × 15 - 20 + 15 + 12 - 18 + 3 × 4 + 18.
4.56 + 56.4 + 64.5 = ? + 10.46
What will come in the place of question mark (?) in the given expression?
? X 7 + (243)⁽²/⁵⁾ = 380 ÷ 2 + 71
If x²- 5x + 1 = 0, what is the value of x² + 1/x2?
36% of 640 – 12.5% of 352 + 25% of 640 = ? – 48% of 432
∛857375 + ∛91125 = ? + √6889