Q1:

LCM and HCF of two numbers are 120 and 4.If one of the number is 40 ,what will be the second number?

Q2:

At a disco club “CLOUD9” is flashed using neon light. The words are flashed in pair(CL,OU and D9) at the intervals of 2.5 seconds,4.25 seconds, and 5.125 seconds respectively, and each word is put off after a second. The least time after which the full name of the disco can be read again is :

Q3:

Find the LCM of following

$\frac{11}{12},\frac{6}{8},\frac{33}{40}$

Q4:

Sum of two numbers is 16 and their HCF is 4. A denotes the greater of the two numbers, find the value of A.

Q5:

HCF of two numbers is 23 and product of other factors of their LCM is 15.Find the minimum difference between the two numbers .

Q6:

3 bars of length 16, 20 and 24 cm are cut into equal parts and are packed in a box which can contain maximum of two pieces of such rods. Find the minimum number of boxes required.

Q7:

Three sprinters running on a circular track completes a lap in 4 minutes,5 minutes and 7 minutes. Find the time after which they will meet for the 1^st time at the starting point when all the three sprinters start running simultaneously.

Q8:

Convert 725 in base 6

Q9:

Convert ${(1001123)}_4$in decimal form.

Q10:

Find the number of times digit (1) is used while writing numbers from  1 to 100.

Q11:

Find the number of digits printed on a book having 392 pages such that the digits are only used to indicate the page number of the book.

Q12:

In a book, the page numbers are given in form a, b, b, c, c, c,….find the alphabet written on the 100^th page of the book.