alleryꯑꯣꯏꯒꯅꯤ꯫ ꯔꯣ ꯁꯥꯏꯖꯁꯤꯡ ꯑꯁꯤ ꯆꯞ ꯃꯥꯟꯅꯅꯥ ꯍꯦꯅꯒꯠꯂꯀꯏ; ꯔꯣ 4ꯗꯥ 19 ꯂꯩ ꯑꯃꯁꯨꯡ ꯔꯣ 10ꯗꯥ 49 ꯂꯩ꯫ ꯔꯣ 15 ꯁꯥꯏꯖꯒꯤ ꯑꯣꯏꯕꯥ?
A79
B74
C69
D84
Answer & Solution
Correct answer: B. 74
ꯑꯣꯏꯒꯅꯤ꯫
ꯔꯣ ꯑꯃꯗꯥ ꯍꯦꯅꯒꯠꯂꯀꯄꯥ ꯑꯁꯤ (49 − 19) ÷ 6 = 5ꯅꯤ, ꯃꯔꯝ ꯑꯗꯨꯅꯥ ꯔꯣ 15ꯗꯥ 49 + 5 × 5 = 74 ꯂꯩ꯫
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Continue the patternsContinue the patternsUse1–6 once in a row. The5 absolute neighbour differences must be1–5 once each. First=2,laStart at2; alternate×2+a, then×3−b, with a,b each1–4. Exactly one other term is wrong:2,8,Two arithmetic progressions alternate. One adjacent pair was swapped:3,6,8,13,10,14,18,18.The row a,b,c,d,e,f uses1–6 once. c=a+b; e=b+d; f=a+d; a<b<d. Find e.Match the calculated resultLabels 7, 12, 17, ..., 82 rise by 5; one is lost, leaving sum 660. Lost label?