Question

Question numbers 21 to 26 carry 2 marks each.
21. The HCF and LCM of two numbers are 9 and 360 respectively. If one number is 45, find the other
number
OR
Show that 7-15 is irrational, given that V5 is irrational
22. Find the 20th term from the last term of the AP 3, 8, 13,....,253
OR
If 7 times the 7th term of an AP is equal to 11 times its 11th term, then find its 18th term
23. Find the coordinates of the point P which divides the line joining of A (-2,5) and B (3,-5) in the ratio
23.
24. A card is drawn at random from a well shuffled deck of 52 cards. Find the probability of getting neither
a red card nor a queen.
2
25. Two dice are thrown at the same time and the product of numbers appearing on them is noted. Find
the probability that the product is a prime number
26. For what value of p will the following pair of linear equations have infinitely many solutions.
(-3) x + 3y =p
px+py = 12​

Answer 1

Step-by-step explanation:

21)LCM×HCF=product of the no

360×9=x×45

x=(360×9)/45

x=72

22)7(a7)=11(a11)

7(a+6d)=11(a+10d)

7a+42d=11a+110d

11a-7a+110d-42d=0

4a+68d=0

a+17d=0

It's 18th term is zero

Please mark it as brainliest