Number System Basics for Aptitude preparation
- 1. Number system Quantitative aptitude B GAYATHRI EXECUTIVE TRAINER
- 2. Why number system…… The number system is a fundamental topic in competitive exams because it's the basis for many mathematical operations and concepts. A strong understanding of number systems is essential for solving questions in other areas, such as: simplification, ratio and proportion, percentage, profit and loss, and averages.
- 3. ered… DIVISIBILITY RULE FINDING UNIT DIGIT PRACTICE QUESTIONS PLACE VALUE & FACE VALUE
- 5. t is prime number…..????
- 6. How?
- 7. Is 39 a prime number? YES Its your turn… NO
- 8. DIFFERENCE BETWEEN PLACE & FACE VALUE
- 9. What is the numerical difference between the place value and face value of 6 in the number 48697? 600 – 6 = 594 What is the numerical sum of the place value and face value of 2 in the number 352435? 2000 + 2 = 2002
- 10. …. If the number 97215A6 is divisible by 11, find the smallest whole number in the place of A. 3 8 6 4
- 11. bility rule What is the rule for 7..?
- 12. isibility rule of 7, 11 & 13
- 13. Is 325687 divisible by 7? YES NO Its your turn…
- 14. …. If the number 97215A6 is divisible by 11, find the smallest whole number in the place of A. 3 8 6 4
- 15. TRY TO SOLVE…. Which of the following numbers are divisible by 2, 5 and 10? 149 30000 19400 720345
- 16. TRY TO SOLVE…. Check whether the numbers are divisibility by 4: 23408 150126 34972 100246
- 17. TRY TO SOLVE…. In each of the following numbers without doing actual division, determine whether the first number is divisible by the second number: 3409122 ; 6 11309634; 8 2450 ; 7 17218 ; 3
- 18. TRY TO SOLVE…. If the number 1005x4 is completely divisible by 8, then the smallest integer in place of x will be: 0 2 4 1
- 20. What is Unit Digit….??
- 22. CYCLICITY OF NUMBERS DIGIT 4 AND 9 4 ^ (odd) = 4 4 ^ (Even) = 6 9 ^ (odd) = 9 9 ^ (Even) = 1 249^33 + 254^36 + 256^133 Find unit digit of 9 + 6 + 6 = 21 The Answer is 1.
- 23. CYCLICITY OF NUMBERS DIGIT 2, 3, 7 AND 8 Eg : 212 ^ 79 Divide the power by 4 79 / 4. The remainder is 3 Hence, 2^3 = 8. The unit digit is 8. 25^6527 + 36^526 + 73^54 Find unit digit of 0