Number Quizzes Post published:March 26, 2020 Post category:Aptitude Quizzes Post comments:0 Comments 0% 1 votes, 5 avg 2 See time here Aptitude Quizzes Number Quiz 1Total Questions: 10Time: 10 minutes 1 / 10 Category: Number QuestionsThe sum of first 45 natural numbers is: 1280 2070 1035 2140 Explanation:Let Sn =(1 + 2 + 3 + ... + 45). This is an A.P. in which a =1, d =1, n = 45.Sn =n[2a + (n - 1)d]=45x [2 x 1 + (45 - 1) x 1]=45x 46= (45 x 23)222= 45 x (20 + 3)= 45 x 20 + 45 x 3= 900 + 135= 1035.Shorcut Method:Sn =n(n + 1)=45(45 + 1)= 1035.222 / 10 Category: Number QuestionsThe difference of two numbers is 1365. On dividing the larger number by the smaller, we get 6 as quotient and the 15 as remainder. What is the smaller number ? 240 300 270 295 Explanation:Let the smaller number be x. Then larger number = (x + 1365). x + 1365 = 6x + 15 5x = 1350 x = 270Smaller number = 270.3 / 10 Category: Number QuestionsA boy was asked to multiply a number by 25 but by mistake he multiplied by 45 and the answer was 200 more than the correct answer. What was the number? 7 10 12 8 The Correct answer is (C)Answer with explanation:4 / 10 Category: Number QuestionsA number when multiplied by 16 increases by 540. What is the number? 42 30 36 46 The Correct answer is (B)Answer with explanation:Let the number is X.As per question; 16X – X = 540∴15X = 5405 / 10 Category: Number QuestionsWhat is the unit digit in the product of 853 * 1346 * 452 * 226? 5 4 6 8 Answer with explanation:Pick up the unit digit of each number and multiply them;3 in 8536 in 13462 in 4526 in 226∴3 * 6 * 2 * 6 = 216 (consider the unit digit in the product)So, the unit digit in the product of 853 * 1346 * 452 * 226 is 6.6 / 10 Category: Number QuestionsIf two-third of three-fourth of a number is 34, find the 20% of that number? 14.6 13.6 13 14 Answer with explanation:Let the number is X.As per question;7 / 10 Category: Number QuestionsWhich of the following is the result of 1505 x 1505? 2265045 2265015 2265035 2265025 Answer with explanation:Apply formula; (a + b)2 = a2 + b2 + 2ab1505 x 1505=15052= (1500 + 5)2=15002 + 52 + 2 *1500* 5= 2250000 + 25 + 15000= 2265025Solve more problems on numbers.8 / 10 Category: Number QuestionsWhat are the different prime factors of 2400? 3 2 5 4 Answer with explanation:L.C.M of 2400 = 2 x 2 x 2 x 2 x 2 x 3 x 5 x 5The different prime factors are 3 (2, 3 and 5).9 / 10 Category: Number Questions(?) - 19657 - 33994 = 9999 59640 63650 61560 53760 Explanation: 19657 Let x - 53651 = 9999 33994 Then, x = 9999 + 53651 = 63650 ----- 5365110 / 10 Category: Number QuestionsWhich of the following is the output of 495 * 495 – 105 * 105? 360000 300000 350000 234000 Answer with explanation:Apply formula; (a2 – b2) = (a – b) (a+b)495 x 495 – 105 x 105= (4952 – 1052)= (495 – 105) (495 + 105)= 390 * 600= 234000 NameEmail Your score isThe average score is 35% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Exit Satisfied with our quiz?Leave us a review Send feedback Pages: 1 2 3 4 Share on: Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window You Might Also Like Ages Quizzes March 26, 2020 Average Quizzes March 26, 2020 Pie Chart Quizzes March 30, 2020Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
