Challenger App

No.1 PSC Learning App

1M+ Downloads
ആദ്യത്തെ എത്ര അഖണ്ഡ സംഖ്യകളുടെ തുകയാണ് 210?

A20

B21

C19

D30

Answer:

B. 21

Read Explanation:

അഖണ്ഡ സംഖ്യകളുടെ തുക = n(n-1)/2 n(n-1)/2 = 210 n(n-1)=420 n² -n -420 = 0 ⇒ n = 21


Related Questions:

Find the number of digits in the square root of the following number 390625

$$Find the power value of 5 $45^3\times25^2\times16^4\times30^3$

Find the distance between the points 1/2 and 1/6 in the number line
A boy added all natural numbers from 1 to 10, however he added one number twice due to which the sum becomes 58. What is the number which he added twice?
2, 3, 5, 7, .... ഇങ്ങനെ തുടർന്നാൽ 8-ാമത്തെ സംഖ്യ ഏത് ?