Question 12 Marks
| $A$ | $B$ |
| $Q.1.$ Write the prime factorisation if $98.$ | $(a) 2^2\times7$ |
| $Q.2. LCM (a, 18) = 36, HCF (a, 18) = 2$ Find the value of $a$ | $(b) 2\times 7 ^2$ |
| $(c) 4$ |
Answer
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6 questions · timed · auto-graded
| $A$ | $B$ |
| $Q.1.$ Write the prime factorisation if $98.$ | $(a) 2^2\times7$ |
| $Q.2. LCM (a, 18) = 36, HCF (a, 18) = 2$ Find the value of $a$ | $(b) 2\times 7 ^2$ |
| $(c) 4$ |
| $A$ | $B$ |
| $Q.1.$ Find the $HCF$ of $32$ and $33$ | $(a) 1$ |
| $Q.2.$ The product of two consecutive positive integers is always divisible by $......$ | $(b) 2$ |
| $(c) 3$ |
| $A$ | $B$ |
| $Q.1$. Which number is $0.120\ 1200\ 12000\ 120000 ......$ | $(a)5$ |
| $Q.2.$ Write the $HCF$ of $15$ and $51$ | $(b)$irrational |
| $(c)3$ |
| $A$ | $B$ |
| $Q.1.$ Which number is $3 + \sqrt 3?$ | $(a)\sqrt4$ |
| $Q.2. ..........$ is not an irrational number. | $(b)\sqrt5$ |
| $(c)$ irrational |
| $A$ | $B$ |
| $Q.1.$ If $HCF$ of two numbers is their product then find their $LCM$ | $(a) \frac{0}{4}$ |
| $Q.2.$ Which number is a rational number $?$ | $(b) \frac{4}{0}$ |
| $(c) 1$ |
| $A$ | $B$ |
| $Q.1.$ If $P$ is a natural number greater than $1$ and $P$ has a factor only $(a)$ Primeitself except $1,$ then $P$ is called which number $?$ | $(a)$ Prime |
| $Q.2$. If $P_1$ and $P_2$ are distinct prime integers then their $HCF$ is ...... | $(b) P_1 P_2$ |
| $(c) 1$ |