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Questions(204)

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The digit in the units place of a number is equal to the digit in the tens place of half of that number and the digit in the tens place of that number is less than the digit in units place of half of the number by $1.$ If the sum of the digits of the number is $7,$ then what is the number?

view details (1 answer)The product of two consecutive prime numbers is $3127.$ What is the greater number?

view details (1 answer)If $(2a−3b)(2a+3b)=17$ and $(3a−2b)(3a+2b)=22$ then what is the value of $a^2+b^2a^2−b^2$

view details (1 answer)If the sum of first $2$ terms of a geometric progression is $7$ and sum of its first $6$ terms is $9,$ then sum of its first $8$ terms is

view details (1 answer)There are two, 2-digit numbers $ab$ and $cd.$ $ba$ is another 2-digit number prepared by reversing the digits of $ab.$ If $ab×cd=493$ and $ba×cd=2059,$ what is the value of $(ab+cd)?$

view details (1 answer)How many different 3-digit number divisible by $5$ can be formed using the elements of the set $\text{A} =\{1,2,3,4,5,6\}$

view details (1 answer)In a post office, stamps of three different denominations of $7,8,10$ are available. The exact amount for which one cannot buy stamps is

(A) $19~~$ (B) $20~~$ (C) $23~~$ (D) $29~~$

view details (1 answer)(A) $19~~$ (B) $20~~$ (C) $23~~$ (D) $29~~$