Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 544 · 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) yes, it is certain (b) no, check more (c) yes, mangoes match (d) no mango is sweet
2. 2.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
3. 3.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Tara bought 3 notebooks and a water bottle for ₹225 in all. Each notebook cost the same. What did one notebook cost? (a) ₹225 (b) ₹222 (c) not enough info (d) ₹75
5. 5.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 60 (b) not enough info (c) 12 (d) 6
6. 6.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
8. 8.🧩 A box has 3 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 10 (b) 28 (c) not enough info (d) 21
9. 9.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
10. 10.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Saanvi is 8 years old. Kabir is 8 years older than Saanvi. How old is Kabir? (a) 16 (b) 8 (c) 17 (d) not enough info
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
13. 13.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 4 PM (c) not enough info (d) 5 PM
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
15. 15.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
16. 16.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 8 PM
17. 17.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Rohan bought 2 mangoes for ₹40 in all. Each mango cost the same. What did one mango cost? (a) ₹40 (b) ₹25 (c) ₹20 (d) not enough info
19. 19.🧩 Kabir is 8 years old. Saanvi is 8 years older than Kabir. How old is Saanvi? (a) 16 (b) not enough info (c) 8 (d) 17
20. 20.🧩 Saanvi is 12 years old. Vihaan is 3 years older than Saanvi. How old is Vihaan? (a) 16 (b) not enough info (c) 15 (d) 3
21. 21.🧩 Vihaan bought 5 mangoes and a lunch box for ₹145 in all. Each mango cost the same. What did one mango cost? (a) ₹140 (b) ₹145 (c) ₹29 (d) not enough info
22. 22.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
23. 23.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
24. 24.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) 12 (b) 6 (c) not enough info (d) 60
25. 25.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 70 (b) 14 (c) 7 (d) not enough info
26. 26.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
27. 27.🧩 A box has 3 rows of apples, with 4 in each row. How many apples are in the box? (a) 7 (b) 12 (c) 16 (d) not enough info
28. 28.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 6 PM (c) 7 PM (d) not enough info
29. 29.🧩 Kabir bought 6 mangoes for ₹330 in all. Each mango cost the same. What did one mango cost? (a) ₹55 (b) not enough info (c) ₹330 (d) ₹60
30. 30.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 8 (b) not enough info (c) 16 (d) 80
31. 31.🧩 Meera bought 4 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹35 (b) ₹120 (c) not enough info (d) ₹30
32. 32.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
33. 33.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
34. 34.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 7 PM
35. 35.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
36. 36.🧩 Saanvi bought 5 balls and a cap for ₹205 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹41 (c) ₹200 (d) ₹205
37. 37.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
38. 38.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
39. 39.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
40. 40.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class

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