Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 497 · 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.🧩 Ananya bought 6 notebooks for ₹360 in all. Each notebook cost the same. What did one notebook cost? (a) ₹360 (b) ₹65 (c) ₹60 (d) not enough info
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Ishaan bought 6 pens for ₹360 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹65 (c) ₹60 (d) ₹360
4. 4.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, it is certain (d) yes, mangoes match
5. 5.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 40 (b) 8 (c) 4 (d) not enough info
6. 6.🧩 Aarav is 6 years old. Ananya is 2 years older than Aarav. How old is Ananya? (a) 2 (b) 9 (c) 8 (d) not enough info
7. 7.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
9. 9.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
10. 10.🧩 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
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
12. 12.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
13. 13.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
14. 14.🧩 A box has 4 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 13 (b) not enough info (c) 45 (d) 36
15. 15.🧩 Kabir bought 2 mangoes for ₹20 in all. Each mango cost the same. What did one mango cost? (a) ₹15 (b) ₹20 (c) ₹10 (d) not enough info
16. 16.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Diya bought 5 kites for ₹225 in all. Each kite cost the same. What did one kite cost? (a) ₹50 (b) not enough info (c) ₹45 (d) ₹225
19. 19.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 5 PM (c) not enough info (d) 9 PM
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
21. 21.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
22. 22.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 40 (c) 8 (d) not enough info
23. 23.🧩 Arjun is 11 years old. Meera is older than Arjun. How old is Meera? (a) 16 (b) 12 (c) not enough info (d) 13
24. 24.🧩 Rohan is 9 years old. Saanvi is 7 years older than Rohan. How old is Saanvi? (a) not enough info (b) 16 (c) 17 (d) 7
25. 25.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 5 (b) 50 (c) not enough info (d) 10
26. 26.🧩 Diya bought 5 kites and a bag for ₹310 in all. Each kite cost the same. What did one kite cost? (a) ₹305 (b) not enough info (c) ₹310 (d) ₹62
27. 27.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 8 PM
28. 28.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
29. 29.🧩 Vihaan bought 2 pens for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹80 (b) ₹40 (c) not enough info (d) ₹45
30. 30.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 4 PM
31. 31.🧩 Ananya bought 6 kites for ₹300 in all. Each kite cost the same. What did one kite cost? (a) ₹300 (b) ₹50 (c) ₹55 (d) not enough info
32. 32.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Ishaan is 10 years old. Saanvi is 5 years older than Ishaan. How old is Saanvi? (a) 5 (b) not enough info (c) 16 (d) 15
34. 34.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
35. 35.🧩 Rohan is 12 years old. Meera is 6 years older than Rohan. How old is Meera? (a) not enough info (b) 18 (c) 19 (d) 6
36. 36.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
37. 37.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
38. 38.🧩 A box has 4 rows of apples, with 9 in each row. How many apples are in the box? (a) 45 (b) not enough info (c) 13 (d) 36
39. 39.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
40. 40.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing

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