Question
Find the sum of all multiples of 9 between 1 and 100
(including both ends if applicable).Solution
First multiple of 9 in this range: 9 Last multiple less than or equal to 100: 99 Sequence: 9, 18, 27, …, 99 (AP with a = 9, d = 9) Number of terms n: 99 = 9 + (n − 1) × 9 99 − 9 = 9(n − 1) 90 = 9(n − 1) ⇒ n − 1 = 10 ⇒ n = 11 Sum = n/2 × (first + last) = 11/2 × (9 + 99) = 11/2 × 108 = 11 × 54 = 594 Answer: 594.
92% of 1650 + 32² = ? + 1504 ÷ 16
What approximate value will come in place of question (?) in the following given expression? You are not expected to calculate the exact value.
...- √81.45 + √225.60 + 49.89% of (520.43 + 22.13% of 131.45) = ?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
956.41 of 45.06% = ?
39.9% of 1720 + 80.2% of 630 = 89.9% of 1280 + ?
(√845 ×19.932+ √4230 ×14.385)/(√1765 ×4.877 ) = ?
(91.004)2 - (40.003)2 - (52.9)2 = ?
A Sales Executive gets a commission on total sales at 10%. If the sale is exceeded Rs.15,000 he gets an additional commission as a bonus of 5% on the ex...
10.232 + 19.98% of 539.99 = ? × 7.99
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