Question
The number of terms in the sequence 20, 25, 30,
….., 160 is:Solution
Formula used: l = a + (n – 1)d Here, l = last term a = first term n = number of terms d = difference between two term (t – t ) Accordint to question, => d = t2 – t1 = 25 – 20 = 5 Let the number of terms be n. ⇒ 160 = 20 + (n – 1)5 ⇒ 140 = (n – 1)5 ⇒ n = 29 ∴ Number of terms = 29
More Series Questions
What will come in the place of question mark (?) in the given expression?
(12.09)2 × 5.98 ÷ 26.95 = ? + 25Â
√441 * 7 – 10% of 250 + ? = 140% of 120
30% of 8/5 × 5/7 × 2870 =?
1231 + 1312 + 2113 – 3211 = ?
{(3/8) + (5/6)} × 120 – 53 = ?Â
What will come in the place of question mark (?) in the given expression?
23 X 35 - ? = (132 + 16) X 3 + 25
56 × 18 + ? × 21 – 49 × 12 = 63 × 26Â
- Evaluate: 168 ÷ 12 × 5 + 190 – 20% of 450
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