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.
How many pairs of letters are there in the word “FUNCTIONAL” which has as many letters between them in the word as in the English alphabetical serie...
Statements:
Only Song are Lyrics.
Some Song are Music.
All Music are Composer.
Conclusion:
I. All Song are Composer i...
Silent : Loud :: Dim : ?
Which of the following sequences represents the correct English dictionary order of the following words?
1. Approach
2. Approval
If 'ABACUS' is coded as 'CEEARO’, how will ‘EFFORT’ be coded as in the same code?
Find the ODD one out from the given options.
If 'KLING' is written as 'GIKLN', then based on the same pattern ' ANTHEM ' will be written as?
Select the number-cluster that is related to third letter-cluster in the same way first letter cluster and fifth-letter cluster is related to second nu...
Each vowel in the word 'PLATFORM' is changed to the following letter is the English alphabetical order and each consonant is changed to the preceding le...
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