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What will come in place of question mark (?) in the following number series?
19, 38, ?, 456, 2280, 13680
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19 * 2=38
38 * 3=114
114 * 4=456
456 * 5=2280
2280 * 6=13680
45, 112, 181, ?, 325, 400
45 + 67=112
112 + 69=181
181 + 71=252
252 + 73=325
325 + 75=400
361, ?, 169, 121, 49, 25
192 =361
172 =289
132 =169
112 =121
72 =49
52 =25
899, 896, 880, ?, -541, -17348
899 – 31 =896
896 – 42 =880
880 – 53 =755
755 – 64 =-541
-541 – 75 =-17348
12, 30, 90, ?, 1260, 5670
12 * 2.5=30
30 * 3=90
90 * 3.5=315
315 * 4=1260
1260 * 4.5=5670
What is the value should come in place of question mark in the following questions?
18 * 10 + 12.5 * 24 – 48 * 8 =? + √256
180 + 300 – 384 =? + 16
?=80
80% of 420 + (64 ÷ 136) * (17 ÷ √16) +? = 15 * 25
80% of 420 + (64 ÷ 136) * (17 ÷ √16) + ? = 15 * 25
336 + 2 + ? =375
?=37
720 ÷ 8 + 25% of 680 + 15% of 60 + 30 % of 40=?
90 + 170 + 9 + 12=?
?=281
3200 ÷ 40 + 120% of 40 + ?=√729 * 8
80 + 48 + ? =216
?=88
145% of 80 - √676 + 40 * 12 – 381=?
116 – 26 + 480 – 381=?
?=189
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