Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 365 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Rohan bought 5 balls and a bag for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹175 (b) ₹36 (c) not enough info (d) ₹180
2. 2.🧩 Diya bought 6 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) ₹60 (c) not enough info (d) ₹10
3. 3.🧩 Diya is 8 years old. Ananya is older than Diya. How old is Ananya? (a) 10 (b) not enough info (c) 13 (d) 9
4. 4.🧩 Saanvi bought 2 pens and a bag for ₹110 in all. Each pen cost the same. What did one pen cost? (a) ₹110 (b) not enough info (c) ₹55 (d) ₹108
5. 5.🧩 Arjun is 6 years old. Saanvi is 4 years older than Arjun. How old is Saanvi? (a) 10 (b) 11 (c) not enough info (d) 4
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
8. 8.🧩 Diya bought 3 balls and a bag for ₹100 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹100 (c) ₹97 (d) ₹33
9. 9.🧩 Meera bought 2 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) not enough info (c) ₹100 (d) ₹55
10. 10.🧩 Meera bought 2 mangoes and a lunch box for ₹160 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹80 (c) ₹160 (d) ₹158
11. 11.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) yes, it is certain (c) no mango is sweet (d) no, check more
12. 12.🧩 Rohan is 6 years old. Kabir is older than Rohan. How old is Kabir? (a) 8 (b) 11 (c) not enough info (d) 7
13. 13.🧩 Vihaan is 6 years old. Saanvi is 5 years older than Vihaan. How old is Saanvi? (a) not enough info (b) 5 (c) 11 (d) 12
14. 14.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
15. 15.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
16. 16.🧩 Ishaan bought 4 balls for ₹240 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹60 (c) ₹240 (d) ₹65
17. 17.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
18. 18.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
19. 19.🧩 Rohan is 10 years old. Aarav is 3 years older than Rohan. How old is Aarav? (a) 14 (b) 13 (c) not enough info (d) 3
20. 20.🧩 Diya bought 5 markers and a lunch box for ₹355 in all. Each marker cost the same. What did one marker cost? (a) ₹355 (b) not enough info (c) ₹71 (d) ₹350
21. 21.🧩 Vihaan bought 5 notebooks for ₹125 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) not enough info (c) ₹30 (d) ₹125
22. 22.🧩 Rohan bought 3 markers and a water bottle for ₹260 in all. Each marker cost the same. What did one marker cost? (a) ₹260 (b) ₹86 (c) ₹257 (d) not enough info
23. 23.🧩 Nisha bought 3 kites and a water bottle for ₹170 in all. Each kite cost the same. What did one kite cost? (a) ₹170 (b) ₹56 (c) ₹167 (d) not enough info
24. 24.🧩 Aarav is 6 years old. Meera is older than Aarav. How old is Meera? (a) 7 (b) 8 (c) not enough info (d) 11
25. 25.🧩 Tara bought 6 mangoes for ₹240 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹240 (c) ₹40 (d) ₹45
26. 26.🧩 Tara is 7 years old. Vihaan is older than Tara. How old is Vihaan? (a) 9 (b) 12 (c) not enough info (d) 8
27. 27.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
28. 28.🧩 A box has 6 rows of apples, with 5 in each row. How many apples are in the box? (a) 11 (b) 35 (c) not enough info (d) 30
29. 29.🧩 Diya is 10 years old. Meera is 6 years older than Diya. How old is Meera? (a) 6 (b) 17 (c) 16 (d) not enough info
30. 30.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 10 (b) 5 (c) 50 (d) not enough info
31. 31.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
32. 32.🧩 Diya bought 3 pens and a lunch box for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹120 (b) ₹117 (c) not enough info (d) ₹40
33. 33.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 3 PM (d) 4 PM
34. 34.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
35. 35.🧩 Kabir is 12 years old. Saanvi is 3 years older than Kabir. How old is Saanvi? (a) 15 (b) not enough info (c) 3 (d) 16
36. 36.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
37. 37.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
38. 38.🧩 A box has 7 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 15 (b) not enough info (c) 56 (d) 64
39. 39.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
40. 40.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence

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