## Aashish Arora is teaching live on Unacademy Plus

S50 CraSH COURSE ON SSC REASONING SEGMENT-1 MISSING NUMBERS {NUMBER SERIES AND OTHER FORMS) By: Aashish Arora

ABOUT ME: o I have done BSc. (Non-Med) from o I am running a HOME TUTORING o I have 4 years experience in o Hobbies : Reading books, Gaming, o Course Fee : Contribute (Optional) Kurukshetra University firm in my city. teaching. teaching etc. Rate Review Recommend

MISSING NUMBERS Number Series Other Forms 10664 98 84 14 463, 452, 439, 424,? 62 12 45 If 24x2-84, and 32x3-69, then 13x3=? af 24x2 = 84, 3 32x3= 69 13x3 = ?

Types of Number Series Increasing Series Additiorn Multiplication Multiply and then other operation(t,-) Multiply and then other operation(+.-) Decreasing Series Addition .Multiplication Multiply and then other operation(+-) Mixed Series Increase then decrease and vice versa Squares and vie versa , Cubes etc

IMPORTANT APPROACH: 3 ,13, 37, 87, 191, 401 3,13,37,87, 191,401 Start From Here (3 x 2) (13x 2) (37x 2) (87x 2) (191x 2) +7 +11 13 17 19 +6 34, 89, 40 ,95, 52,? +6 +12

PRIME NUMBERS o a number that is divisible only by itself and 1 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47 Factor factor number is every number Multiple When you given any other number multiply whole of that of a given whole number by that divides exactly into the result is that number. multiple umber. 10 2 x 5, are factors of Also are factors of so numbers 2 and 5 10 10 = 10 x 1 10 so 10 and 10. 1 Multiples of 3 are 3, 6,9,12,15,18,21,24,.. 1, 2, 5, The factors of 10 are 10.

LCM The least common multiple (LCM) of two numbers is the smallest number (not zero) that is a multiple of both o Multiples of 3 @s. 6, 9 5, 18, 21e.. 04. 81216,202 28 Multiples of 4: 0,4, 8 12 16, 20 24 28 The LCM of 3 and 4 is 12. HCF o The Highest Common Factor (H.C.F) is the largest of all the common factors. The common factors or of 12 and 18 are 1, 2, 3 and 6. The largest common factor is 6, so this is the H.C.F. of 12 and 18.

SQUARES UPTO 30 AND CUBES UPTO 15 NUMBER CUBE 112 121 122 144 13 = 169 142 196 15 22 162 = 256 172 = 289 182-324 192= 361 202 = 400 212 = 441 222 = 484 232 = 529 24 5 76 252 625 262 676 272 729 282 784 292 = 841 302 = 900 27 64 42 = 16 125 216 62 36 72 = 49 82 64 9 81 102 = 100 343 512 729 9 10 1000 1331 12 1728 13 2197 14 2744 15 3375

11 12 13 1415 16 17 18 1920 1 11 12 13 14 1516 17 18 1920 2 222426283032 34 3638 40 3 33363942 454851545760 4 44 4852 56 60 646872 76 80 5 55 60 65 7075 8085 90 95 100 6 66727884 9096 102 108 114120 7 7784 91 98 105 112 119 126 133 140 8 88 96 104 112 120128 136 144 152 160 9 99 108 117 126 135 144 153 162 171 180 10 110 120 130140 150 160 170180 190200 110 120 130-500

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