Numbers 3 Quantitative Aptitude (Common Paper) Presented by Bharath Lecture 1

ACE VALUE PLACE VALUE -54100 3 12345-1x100002x1000+3x100 4x10+5x1 Face value of 3-3; Place value of 3 3x(10 2)-300

Classifications Natural no: nnE [1,2,3,4,5 Whole no: n20 ne [0,1,2,3,4,5, ] . Integers ,00<nco ne [....-2,-1 ,0,1,2,3,4,5, Even and Odd Prime and Composite Co-primes and Twins

Rationals and Irrationals Recurring and non recurring HCF AND LCM 18 20 and 30 prime factorisation 2 18 2 20 2 B0 3 9 2 10 3 15 5 3 5 18-2 x (342) 20 5 (2A2) 30 5 x 2x3 LCM = 180 HCF 2

Fractions and Decimals a c e HCF(a,c,e b'd f LCM (b,d,f) 3 LCM( LCM Cace) b d HCF(b,d,

Divisibility Criteria By 2: all even numbers nes By 3: sum of digits Eg: 6654606+6+5+4+6+0 27 27 is divisible by 3 By4: last 2 digits by 4 By 5: last digit either 0 or 5

Divisible by 2 and 3 mode( Twice last digit - no formed with rest) divisible by 7 ; mode ( (2x3)-160)#154 Since 7x 22 154; 1603 is divisible by 7 By 6: By 7: Eg: 1603

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Madhuri Gupta

4 months ago

is vanderwaals forces only define for non-polar compounds?

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