Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 160 · 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.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, mangoes match (d) yes, it is certain
2. 2.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 8 PM (c) 4 PM (d) 7 PM
3. 3.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Ananya is 10 years old. Arjun is 3 years older than Ananya. How old is Arjun? (a) 14 (b) not enough info (c) 13 (d) 3
5. 5.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
7. 7.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
8. 8.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
9. 9.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
10. 10.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
11. 11.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 6 PM (c) 8 PM (d) not enough info
12. 12.🧩 Nisha bought 2 kites for ₹70 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹70 (c) ₹35 (d) ₹40
13. 13.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
14. 14.🧩 Nisha bought 2 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹45 (c) ₹40 (d) ₹80
15. 15.🧩 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
16. 16.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 20 (b) 8 (c) 16 (d) not enough info
17. 17.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) 16 (b) not enough info (c) 80 (d) 8
18. 18.🧩 Vihaan is 9 years old. Nisha is 7 years older than Vihaan. How old is Nisha? (a) not enough info (b) 7 (c) 16 (d) 17
19. 19.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
20. 20.🧩 A box has 8 rows of guavas, with 5 in each row. How many guavas are in the box? (a) not enough info (b) 40 (c) 13 (d) 45
21. 21.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
22. 22.🧩 Meera is 6 years old. Rohan is 8 years older than Meera. How old is Rohan? (a) 15 (b) 8 (c) 14 (d) not enough info
23. 23.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
24. 24.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
25. 25.🧩 Vihaan bought 5 mangoes for ₹275 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) ₹55 (c) not enough info (d) ₹275
26. 26.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
27. 27.🧩 Saanvi bought 6 kites for ₹330 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) ₹330 (c) ₹55 (d) not enough info
28. 28.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
30. 30.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 9 PM (c) 7 PM (d) 8 PM
31. 31.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
32. 32.🧩 Arjun bought 3 mangoes for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹150 (b) ₹55 (c) not enough info (d) ₹50
33. 33.🧩 A box has 3 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 28 (b) not enough info (c) 10 (d) 21
34. 34.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) not enough info (b) 12 (c) 60 (d) 6
35. 35.🧩 Aarav bought 4 notebooks and a water bottle for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹56 (c) ₹60 (d) ₹15
36. 36.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 50 (b) 5 (c) 10 (d) not enough info
37. 37.🧩 A box has 4 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 16 (b) 20 (c) not enough info (d) 8
38. 38.🧩 Kabir is 6 years old. Saanvi is older than Kabir. How old is Saanvi? (a) not enough info (b) 7 (c) 11 (d) 8
39. 39.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
40. 40.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 3 PM (d) 5 PM

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