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Tag Archives: Progressions

Given an array arr[] consisting of N integers and an array Q[][2] consisting of M queries of the form {L, R}, the task for each… Read More
Given an array arr[] of N integers, the task is to find the count of all subarrays from the given array of at least size… Read More
Given two integers A, B which are any two terms of an Arithmetic Progression series, and an integer N, the task is to to construct… Read More
Given a binary tree, the task is to check whether the nodes in this tree form an arithmetic progression, geometric progression or harmonic progression. Examples:… Read More
The value of the expression 100∑i=2 1/logi100! is: (A) 0.01 (B) 0.1 (C) 1 (D) 10 Answer: (C) Explanation: The expression 100∑i=2 1/logi100! can be… Read More
Expression 13∑n=11/n can also be written as x/13! What would be the remainder if x is divided by 11? (A) 2 (B) 4 (C) 7… Read More
x, 17, 3x – y2 – 2 and 3x + y2 – 30 are four consecutive terms of an increasing arithmetic sequence. The sum of… Read More
log1010 + log10102 + … + log1010n (A) n2 + 1 (B) n2 – 1 (C) [(n2 + n)/2] * [(n(n+1))/3] (D) (n2 + n)/2… Read More
The average of 7 consecutive number is P. If the next three numbers are also added, the average shall: (A) Remain unchanged (B) Increase by… Read More
A tennis ball is initially dropped from a height of 180 m. After striking the ground, it rebounds (3/5)th of the height from which it… Read More
If the product of n positive integers is nn, then their sum is: (A) A negative integer (B) Equal to n (C) Equal to n+(1/n)… Read More
Find the sum of series: 1/3, 1/9, 1/27, 1/81…………….. (A) 1/2 (B) 1/3 (C) 1/4 (D) 1/6 Answer: (A) Explanation: Sn=a/(1-r) = (1/3)/(1-1/3) =1/2 Quiz… Read More
Find the sum of series: 1, 3, 9, 27, 81, …………..39 (A) [(1-310)]/(1-3) (B) 18 (C) 10 (D) 20 Answer: (A) Explanation: Sol: Sn=[a(1-rn)]/(1-r) =[1(1-310)]/(1-3)… Read More
Find Arithmetic Mean of series: 2, 2.5, 3, 3. 5, 4, 4. 5……….11 (A) 13/2 (B) 25/8 (C) 19 (D) 22/9 Answer: (A) Explanation: AM… Read More
Find sum of series: 2, 2.5, 3, 3. 5, 4, 4. 5……….11 (A) 120 (B) 123.5 (C) 126.5 (D) 118.5 Answer: (B) Explanation: sum of… Read More