Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 49 · 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.🧩 Aarav bought 3 mangoes and a bag for ₹65 in all. Each mango cost the same. What did one mango cost? (a) ₹62 (b) not enough info (c) ₹21 (d) ₹65
2. 2.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
3. 3.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 14 (b) not enough info (c) 7 (d) 70
4. 4.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
5. 5.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
6. 6.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
7. 7.🧩 Diya is 7 years old. Saanvi is older than Diya. How old is Saanvi? (a) 9 (b) 12 (c) 8 (d) not enough info
8. 8.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 4 PM
9. 9.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 5 PM (d) 7 PM
10. 10.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
11. 11.🧩 A box has 4 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 13 (b) 45 (c) 36 (d) not enough info
12. 12.🧩 Meera bought 3 balls and a lunch box for ₹105 in all. Each ball cost the same. What did one ball cost? (a) ₹102 (b) ₹105 (c) ₹35 (d) not enough info
13. 13.🧩 Tara bought 3 pens and a water bottle for ₹120 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹117 (c) ₹120 (d) ₹40
14. 14.🧩 Vihaan bought 5 markers and a lunch box for ₹255 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹250 (c) ₹255 (d) ₹51
15. 15.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 7 PM (c) 4 PM (d) not enough info
16. 16.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) that one dog barked (d) never see dogs
17. 17.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
18. 18.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
19. 19.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
20. 20.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) not enough info (b) 4 (c) 8 (d) 40
21. 21.🧩 Ananya is 6 years old. Nisha is 7 years older than Ananya. How old is Nisha? (a) 14 (b) 13 (c) 7 (d) not enough info
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
23. 23.🧩 Diya bought 2 notebooks and a lunch box for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) ₹130 (b) ₹65 (c) ₹128 (d) not enough info
24. 24.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 5 PM (c) 3 PM (d) not enough info
25. 25.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
26. 26.🧩 Saanvi bought 3 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹90 (b) not enough info (c) ₹35 (d) ₹30
27. 27.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
28. 28.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 50 (b) not enough info (c) 10 (d) 5
29. 29.🧩 Ishaan is 11 years old. Nisha is 3 years older than Ishaan. How old is Nisha? (a) 15 (b) 3 (c) 14 (d) not enough info
30. 30.🧩 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
31. 31.🧩 Ananya bought 6 mangoes for ₹330 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹330 (c) ₹55 (d) ₹60
32. 32.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
33. 33.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) no, check more (d) yes, mangoes match
34. 34.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 6 PM (d) not enough info
35. 35.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
36. 36.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 9 PM (d) not enough info
37. 37.🧩 A box has 6 rows of apples, with 6 in each row. How many apples are in the box? (a) 42 (b) 12 (c) not enough info (d) 36
38. 38.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
39. 39.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
40. 40.🧩 Nisha bought 2 notebooks for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) not enough info (c) ₹35 (d) ₹70

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