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Number series Question Asked in RRB PO 1ST SHIFT Q1. 14, 16, 12, 18, 10, 22, 8 14+2=16, 16-4=12 12+6=18 18-8=10 10+10=20 20-12=8 Ans: 22   Q2. 19, 23, 32, 48, 72, 109, 158 19-23=4 23-32=9 32-48=16 48-73=25 73-109=36 109-158=49 Ans: 72   Q3. 3, 7, 27, 112, 565, 3396, 23779 3*2+2=8 8*3+3=27 27*4+4=112 112*5+5=565 565*6+6=3396 3396*7+7=23779 Ans: 7   Q4. 4, 6, 12, 30, 90, 317, 1260 4*1.5=6 6*2=12 12*2.5=30 30*3=90 90*3.5=315 315*4=1260 Ans: 317   Q5. 6400, 400, 50, 12.5, 6.25, 3.12, 12.25 6400/16=400 400/8=50 50/4=12.5 12.5/2=6.25 6.25/1=6.25 6.25/0.5=12.25 Ans: 3.12

RRB PO PRELIMS 2023 SHIFT -1 Reasoning  Inequality (5) Syllogism ( 3) only a few (2)=5 Chinese coding -(5) Odd -one-(1 ) Direction distance -( 2) Puzzle Uncertain  (north ) 28 person (3) Circle based (8 person) -(3) 9 box based -(4) Floor based ( country ) -5 Year based -4 Math Approximate -5 Wrong number -5 Quadratic eq - 5 Di ( bar ) - 5 Di ( table ) - 5 (total/ vacant room ) Data sufficient - 5 ARITHMETIC - 10