VI SAI REVISION

REVISION FOR SA1

PLAYING WITH NUMBERS

FIND THE COMMON FACTORS OF

A)56 AND 120         B)35 AND 50

2.EXPRESS EACH OF THE FOLLOWING NUMBERS AS THE SUM OF TWIN PRIME

A)24    B)120

3.EXPRSS EACH OF THE FOLLOWING NUMBERS AS THE SUM OF TWO ODD PRIMES

A)84       B)98

4. REPLACE    *   BY THE SMALLEST AND GREATEST NUMBER FORMED DIVISIBLE BY 3     A)4756*2

5)USING THE DIVISIBILITY RULE CHECK 85479512 IS DIVISIBLE BY 6 OR 8 OR 15

6)FIND THE PRIME FACTORISATION OF THE FOLLOWING NUMBERS

A) 27830       B)4725     C)72

7)WRITE ALL THE PRIME FACTORS OF 1729 AND ARRANGE THEM IN ASCENDING ORDER .NOW STATE THE RELATION .IF ANY ,BETWEEN TWO CONSECUTIVE PRIME NUMBERS.

8)THREE BOYS STEP OFF TOGETHER FROM THE SAME SPOT.THEIR STEP MEASURE 63CM,70CM,AND 77CM RESPECTIVELY. WHAT IS THE MAXIMUM DISTANCE EACH SHOULD COVER SO THAT ALL CAN COVER THE SAME DISTANCE IN COMPLETE STEPS.

9)FIND THE L.C.M OF 36,48,266

INTEGERS

1)EVALUATE  THE FOLLOWING

A)(-203)+501    B)-1083+(-3974)     C)-190-(-3512)

   D)-121-(-78)+(-193)+576     E)31+(-23)-35+18-4-(-3)

F)71-(-25)+37-18+(-11)

2)WRITE EACH OF THE FOLLOWING USING APPROPRIATE INTEGER

A)20̊C BELOW FREEZING POINT  B)DEPOSITING ₹2500 IN ABANK

C)240M BELOW SEA LEVEL

3)WHICH INTEGER LIES BETWEEN -2 AND 3?

4)WRITE THREE CONSECUTIVE INTEGER JUST GREATER THAN 8?